a) If you have 90.0 mL of a 0.200 M solution of ammonia, NH3, how many moles of NH4Cl would you need to add to obtain a buffer with a pH of 9.20. Assume that the addition of the NH4Cl does not change the volume of the solution. Note that the pK, of NH3 is 4.74. NH₂Cl : mol b) What mass of NH4Cl in grams, would need to be added to the original solution to obtain the desired pH? Again, assume that the addition of the NH4Cl does not change the volume of the solution. Mass: g 09

a) If you have 90.0 mL of a 0.200 M solution of ammonia, NH3, how many moles of NH4Cl would you need to add to obtain a buffer with a pH of 9.20. Assume that the addition of the NH4Cl does not change the volume of the solution. Note that the pK, of NH3 is 4.74. NH₂Cl : mol b) What mass of NH4Cl in grams, would need to be added to the original solution to obtain the desired pH? Again, assume that the addition of the NH4Cl does not change the volume of the solution. Mass: g 09

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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